2-oxobutyric acid
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IUPAC name :2-oxobutanoic acid
InChI :InChI=1/C4H6O3/c1-2-3(5)4(6)7/h2H2,1H3,(H,6,7)
InChIKey :TYEYBOSBBBHJIV-UHFFFAOYAT
SMILES :CCC(=O)C(=O)O
cas number :600-18-0
(EINECS) number :209-986-9
beilstein number :1700514
fema number :3723
jecfa number :589
fl. number :08.066
molar refractivity :22.17 ± 0.3 cm3
parachor :218.1 ± 4.0 cm3
index of refraction :1.427 ± 0.02
surface tension :40.8 ± 3.0 dyne/cm
density :1.182 ± 0.06 g/cm3
polarizability :8.79 ± 0.5 10-24cm3
XlogP : -0.20
XlogP3-AA : 0.10
molecular weight : 102.0886400 (IUPAC)
formula :C4 H6 O3
NMR Predictor :Predict
 
 
export tariff code :2915.60.0000
fda reg :unspecified

Suppliers :
Nanjing :2-ketobutyric acid
Penta :2-oxobutyric acid
Pfaltz & Bauer :2-Ketobutyric acid
Sigma-Aldrich-SAFC :2-Oxobutyric acid
97+ %, Kosher
Odor:  caramel; creamy
TCI AMERICA :2-oxobutyric acid
>98.0%(GC)(T)

organoleptics :
odor type :caramellic
odor strength :high ,
recommend smelling in a 1.00 % solution or less
odor description :
at 1.00 % in propylene glycol.  
sweet brown caramel creamy lactonic

properties :
appearence :white clear liquid
assay : 98.00 to 100.00 %   
Food Chemicals Codex Listed :No
melting point : 30.00 to 34.00 °C. @ 760.00 mm Hg
boiling point : 80.00 to 82.00 °C. @ 16.00 mm Hg
flash point : 179.00  °F.  TCC  ( 81.67 °C. )
logP (o/w) : -0.75

safety :
most important hazard(s) :Xi - Irritant
  R 36/37/38 - Irritating to eyes, respiratory system, and skin.
S 02 - Keep out of the reach of children.
S 24/25 - Avoid contact with skin and eyes.
S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S 36/37/39 - Wear suitable clothing, gloves and eye/face protection.
Oral Toxicity(LD50) :
  Not determined
Dermal Toxicity(LD50) :
  Not determined
Inhalation Toxicity(LC50) :
  Not determined
 

safety in use :
Maximised Survey-derived Daily Intakes (MSDI-EU) :0.024 (μg/capita/day)
 
recommendation for 2-oxobutyric acid usage levels up to :
 not for fragrance use.
recommendation for 2-oxobutyric acid usage levels up to :
  25.0000 ppm in the flavor.

safety references :
European Food Safety Athority(efsa) :Flavor usage levels; Subacute, Subchronic, Chronic and Carcinogenicity Studies; Developmental / Reproductive Toxicity Studies; Genotoxicity Studies...
EPI System :view
Cancer Citations :Search
Toxicology Citations :Search
Canada Domestic Sub. List :Yes
EPA Chem. Sub. Inventory : Yes
 
WGK Germany :3
 
 
 
 2-oxobutanoic acid
(EINECS) number :209-986-9
chemidplus :000600180
EPA Substance Registry Services :600-18-0
dtp/nci :60533

references :
 2-oxobutanoic acid
fl. number :08.066
jecfa number :589
NIST Chemistry WebBook :599976876
pubchem :197406

other :
VCF-Online: VCF Volatile Compounds in Food
FDA Everything Added to Food in the United States (EAFUS)View
synonyms :
2-oxobutanoic acid
2-ketobutyric acid
alpha-ketobutyric acid
alpha-oxo-N-butyric acid
3-methyl pyruvic acid
 propionyl formic acid

soluble in :
 alcohol
 water

(odor and/or flavor) blends with :
 acetoin
 acetoin acetate
 acetyl butyryl
2-acetyl furan
 acetyl isobutyryl
 acetyl isovaleryl
 acetyl nonyryl
 acetyl propionyl
3-acetyl-2,5-dimethyl furan
2-acetyl-3,4,5,6-tetrahydropyridine
2-acetyl-3,5(or 6)-dimethyl pyrazine
 allyl 2-furoate
 allyl methyl trisulfide
 allyl nonanoate
isoamyl 3-(2-furan) propionate
6-amyl-alpha-pyrone
 benzyl disulfide
 benzylidene acetone
isobutyl benzyl carbinol
 butyl butyryl lactate
 butyl lactate
 butyl laevo-lactate
 butyl levulinate
 butyric acid
gamma-butyrolactone
 caramel dione
 caramel furanone
 caramel pentadione
 coconut decanone
 creamy lactone
 cyclohexyl acetic acid
 dairy lactone
delta-decalactone
gamma-decalactone
6-decenoic acid
 dehydromenthofurolactone
 diacetyl
2,5-diethyl tetrahydrofuran
1,2-dimethoxybenzene
alpha,alpha-dimethyl anisyl acetone
2,3-dimethyl pyrazine
delta-2-dodecenolactone
 ethyl (E)-crotonate
 ethyl 2-hydroxy-2-methyl butyrate
 ethyl 4-pentenoate
 ethyl cyclopentenolone
 ethyl maltol
 ethyl palmitate
 ethyl pyruvate
(E)-ethyl tiglate
 ethyl undecylenate
 ethyl vanillin
 ethyl vanillin isobutyrate
 ethyl vanillin propylene glycol acetal
5-ethyl-2,3,4,5-tetramethyl-2-cyclohexen-1-one
5-ethyl-3,4,5,6-tetramethyl cyclohexen-2-one
 farnesyl acetone
 fenugreek absolute
 furfuryl acetone
 furfuryl alcohol
 furfuryl octanoate
 furfuryl valerate
 geranyl crotonate
gamma-heptalactone
 heptanal 2,3-butane diol acetal
(Z)-4-hepten-1-al
(Z)-4-hepten-1-al diethyl acetal
(Z)-4-hepten-1-ol
3-heptyl dihydro-5-methyl-2(3H)-furanone
3,4-hexane dione
5-hydroxymethyl furfural
 immortelle absolute
 levulinic acid
 maltol
 maltyl propionate
 mango furanone
 maple furanone
 maple lactone
 massoia bark oil
 massoia lactone
 menthone lactone
 mesitene lactone
 methional
 methyl (Z)-5-octenoate
 methyl 2-thiofuroate
3-methyl butyl 2-furyl butyrate
6-methyl coumarin
 methyl cyclopentenolone
 methyl dihydrojasmonate
5-methyl furfural
 methyl laurate
4-methyl octanoic acid
4-methyl-2,6-dimethoxyphenol
 mint lactone
delta-nonalactone
2-nonanol
1-nonen-3-ol
 nutty cyclohexenone
2,4-octadien-1-ol
gamma-octalactone
3-octen-2-ol
 octyl 2-furoate
 octyl isobutyrate
 peanut oxazole
2-pentanoyl furan
 phthalide
 rosefuran
 shoyu furanone
dextro-sorbitol
 strawberry furanone
 strawberry furanone acetate
dextro,laevo-tartaric acid
delta-tetradecalactone
 tetrahydrofurfuryl acetate
 tetrahydrofurfuryl alcohol
2-thiophene thiol
(E)-tiglic acid
 toffee furanone
 tonka bean absolute
 tonka bean resinoid
(E,E)-2,4-undecadien-1-al
2,4-undecadien-1-al
delta-undecalactone
gamma-undecalactone
 undecanoic acid
isovaleraldehyde propylene glycol acetal
 vanilla oleoresin
 vanillic acid
 vanillin
 vanillyl acetate
 vanillyl alcohol
 vanillyl isobutyrate
 vanillylidene acetone

(odor and/or flavor) used in :
 butterscotch
 caramel
 sugar brown sugar

natural occurrence in :
beer



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